Brake disk



c. L. EKSEI-QGIAN Sept. 17, 1940.

BRAKE DISK 0 o fix k m 7 4 Q 5:; QA 3:; a 5:; a

I 1 & V k 7 5 m 3 M8 INVENTOR Filed May 31, 1939 ATTORNEY Patented Sept.17, 1940 BRAKE DISK Carolus L. Eksergian, Detroit, Mich., assignor'toBudd Wheel Company, Philadelphia, Pa., a cor-' poration of PennsylvaniaApplication May 31, 1939, Serial No. 276,578

8 Claims.

In said type of brake, the braking surfaces are the sides of a ring,usually made of cast iron or the like, and often two rings spaced fromone another to afiord a passage for cooling air between them.

The present invention is of importance where especially strong and rigidtwin brake rings are necessary,

and consists in providing crossed braces between the ringsin place ofthe I-shaped struts which extend at right angles to the rings in theform disclosed in the above named-copending case.

The braces herein used are preferably in the general configuration ofthe letter X, thus affording exceptional strength and rigidity, andmaking the brake rings amply strong enough for the most severe brakingof theheaviest vehicles.

Cooling vanes are braces, and the relative numbers and spacingsinterposed between the of the vanes and braces are to a great degreeimmaterial.

therewith.

Fig. 2 is'a section through the structure illustrated in Fig. l, on theplanes indicated by the broken line 2-2 of said figure.

Fig. 3 is a developed peripheral view of a brake ring, wherein sixcoolingvanes are interposed between the successive X braces.

Fig. 4 is a similar view wherein half as many cooling vanes are locatedbetween the said successive X braces, whichare accordingly spacedsomewhat farther apart.

Referring first to Figs. 1 and 2, I designates the disk or web portionof the brake, which may have any desired number of holes 2 therein, forthe bolts 2a which fasten the disk to the wheel W or axle.

stiffening and centering flange may be provided at the central part ofthe web I if desired.

The brake rings proper are designated by ref-,

It will be noted th vet) I is here disclosed .ing the cooling effect.

as integral with the brake ring 4, in fact the entire structuredisclosed in Figs. 1 and 2 is a single casting in each instance.

The X-shaped cross braces 8 are arranged at any desired intervals, asshown in all the figures, and between successive braces are located thecooling vanes 9. It will be noted that the braces 8 are very heavy andprovide a very substantial and rigid connection between the rings 4 and'5. 10

The cooling vanes or fins 9, however, are relatively thin and the-finsofeach pair do not extend all the way across the space between therings, since their function issolely to assist in disposing of the heatgenerated in braking, and

not to brace the rings.

A large surface area is thus produced between the rings 4 and 5, whichis beneficial in increas- Even the passages l0 within the braces 8 areuseful in this respect, and thus the said braces will also act assooling vanes to a certain extent.

All the junctions between braces or vanes and rings are generouslyfilleted, to provide smooth passages for the cooling air and thusminimize 3 the resistance to the air flow produced by the vanes, actingas a centrifugal blower, when the structure is in rotation.

The vanes 9 preferably are tapered in a radialdirection, that is, theyare narrower at their radially inner ends than at their radially outerends (Fig. 2), so that thus the free area for air flow is substantiallythe same at the inner periphery of the rings 4 and 5 as at their outerone, whereby the air flow suffers the least resistance, as the air isneither compressed nor expanded in traversing the said spaces in aradially outward direction.

Obviously the exact. number of cooling vanes 9 is unimportant, eitherper se or relatively to the number of braces 8 nor is it necessary thatthe vanes 9'be placed symmetrically in opposite pairs,

as illustrated, since the number of vanes on ring 4 need not be the sameas that on. ring 5. While six vanes have been shown in each large radialpassage in Fig. 3, and three in Fig. 4, it should be clearly understoodthat these are purely arbitrary numbers, which may be varied at will.

The operation of the invention will be clearly understood from itsstructure, and-briefly consists in providing adequate rigidcross-bracingbetween the two rings by virtue of the X-shaped braces 8.and at the same time makingample provision for cooling by reason of thevanes 9.

While the web I has been disclosed as cast integrally with the rings 4and 5, this also is an arbitrary feature, and obviously the web I mayequally well be secured to the rings in any other way. The inventiontherefore is to be clearly understood to be defined solely by thefollowing claims.

What I claim is:,

1. A cast metal brake disk comprising two cast metal rings, means forsupporting them upon the rotating part to be braked thereby and bracesintegral with the rings, spacing them from one another, said braceshaving portions disposed at an angle substantially different froma rightangle with respect to the planes of the rings.

2. A brake disk comprising another portion consisting of twosubstantially parallel cast metal rings, and a number of braces castintegrally with the rings and extending radially substantially the fullwidth of the rings, said braces each being of X-shape in cross section.

3. A brake disk comprising a pair of cast metal rings, spaced from oneanother by X-shaped braces cast integral therewith, said braces beingarranged at intervals along the rings, and cooling. vanes integral Withthe rings, disposed in the spaces between the said braces.

4. A brake disk comprising a pair of cast metal rings, spaced from oneanother by X-shaped braces cast integral therewith, said braces beingarranged at intervals along the rings. and cooling vanes integral withthe rings, disposed in the spaces between the said braces, said vanesextending inwardly from each ring, but only a part of the way across tothe other ring.

5. A cast metal twin ring brake member, consisting of two substantiallysimilar rings, connected and spaced from one another by inclined bracesintegral therewith, said braces being suitably spaced around the ringsto provide a strong and rigid structure, the braces having radiallyextending passages therein to provide ducts for cooling air.

6. A cast metal twin ring brake member, consisting of two substantiallysimilar rings, connected and spaced from one another by inclined bracesintegral therewith, said braces being suitably spaced around the ringsto provide a strong and rigid structure, the braces having radiallyextendingpassagestherein to provide ducts for cooling air and a numberof-vanes formed integrally with the brake member, and located betweenthe braces, to provide air currents when the brake member rotates.

7. A cast metal brake disk comprising a ring, a second ringsubstantially parallel thereto, said second ring having a web extendinginwardly therefrom, to serve as a mounting device, and radiallyextending braces, X-shape in. cross section, integral with the rings,extending substantially the full width thereof and rigidly connectingthem in spaced relationship to one another.

8. A brake disk comprising a pair of cast metal rings, spaced from oneanother by braces spaced' from each other and having portions disposedat .an angle substantially difierent from a right angle with respect tothe plane of the rings, and cooling vanes integral with the ringsdisposed in the spaces between said braces.

CAROLUS L. EKSERGIAN.

